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US 12,072,478 B2Granted
Optical system and imaging apparatus including the same
AssigneeCanon Kabushiki Kaisha
InventorTakumi Suzuki
Life of this patent
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AssigneeCanon Kabushiki Kaisha
InventorTakumi Suzuki
Estimating the term…
In an optical system according to each exemplary embodiment, an interval between adjacent lens units changes in focusing from an infinite-distance object to a close-distance object, and a first in-focus state in which β=−1.2 is obtained can be caused, where β is a lateral magnification of an entire system. The optical system according to each exemplary embodiment includes a plurality of focus lens units, and out of a focus lens unit having a largest absolute value of a focus sensitivity and a focus lens unit having a second largest absolute value of a focus sensitivity in a state in which focus is put on an infinite-distance object, a focus lens unit disposed on an object side is a lens unit LA, and a focus lens unit disposed on an image side is a lens unit LB. A partial optical system LC including all lenses disposed on the image side of the lens unit LB has negative refractive power. The partial optical system LC satisfies a predetermined conditional expression.
An optical system in which an interval between adjacent lens units is configured to change during focusing from an infinite-distance object to a close-distance object, and in which in a first in-focus state β=−1.2 is satisfied, where β is a lateral magnification of the optical system, the optical system comprising:
An imaging apparatus comprising:
An optical system in which an interval between adjacent lens units is configured to change during focusing from an infinite-distance object to a close-distance object, and in which in a first in-focus state β=−1.2 is satisfied, where β is a lateral magnification of the optical system, the optical system comprising:
Dependencies are inferred from the claim text.